... Rotary Bur Rotary burrs made of tungsten carbide or high speed steel. Tungsten Carbide burrs ,high speed steel HSS rotary burr.5/8" x ... , Fine Cut, Standard Cut, Double Cut. Aluminum Cut, Diamond Cut, Chip Breaker. Shape: Cylindrical,Cylindrical round-(ball-) nose,Spherical, Oval, Arch ... ,Conical pointed-nose,Inverted cone.High speed steel burr available. Tungsten Carbide burr HSS Rotary burrs HSS